80 lines
1.7 KiB
JavaScript
80 lines
1.7 KiB
JavaScript
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let browserslist = require('browserslist')
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let agents = require('caniuse-lite').agents
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let utils = require('./utils')
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class Browsers {
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/**
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* Return all prefixes for default browser data
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*/
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static prefixes () {
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if (this.prefixesCache) {
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return this.prefixesCache
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}
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this.prefixesCache = []
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for (let name in agents) {
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this.prefixesCache.push(`-${agents[name].prefix}-`)
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}
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this.prefixesCache = utils
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.uniq(this.prefixesCache)
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.sort((a, b) => b.length - a.length)
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return this.prefixesCache
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}
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/**
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* Check is value contain any possible prefix
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*/
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static withPrefix (value) {
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if (!this.prefixesRegexp) {
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this.prefixesRegexp = new RegExp(this.prefixes().join('|'))
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}
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return this.prefixesRegexp.test(value)
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}
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constructor (data, requirements, options, browserslistOpts) {
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this.data = data
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this.options = options || {}
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this.browserslistOpts = browserslistOpts || {}
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this.selected = this.parse(requirements)
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}
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/**
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* Return browsers selected by requirements
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*/
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parse (requirements) {
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let opts = {}
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for (let i in this.browserslistOpts) {
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opts[i] = this.browserslistOpts[i]
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}
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opts.path = this.options.from
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return browserslist(requirements, opts)
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}
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/**
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* Return prefix for selected browser
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*/
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prefix (browser) {
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let [name, version] = browser.split(' ')
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let data = this.data[name]
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let prefix = data.prefix_exceptions && data.prefix_exceptions[version]
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if (!prefix) {
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prefix = data.prefix
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}
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return `-${prefix}-`
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}
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/**
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* Is browser is selected by requirements
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*/
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isSelected (browser) {
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return this.selected.includes(browser)
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}
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}
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module.exports = Browsers
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